Trickflow is building on the features that make the GenX 255 for GM LS3 great—like 12 valve angles and relocated valves for reduced valve shrouding and improved piston-to-valve clearance—Trick Flow's GenX 280 HIP cylinder head withstands the abuse of high horsepower, power-adder performance demanded by today's racers and engine builders.
The GenX 280cc heads list of features is long, and it starts with the HIP'd (Hot Isostatic Pressed) castings. This process significantly increases the casting's density for improved tensile and fatigue strength. It continues with industry leading airflow through CNC Competition Ported 280cc intake ports and Trick-Alloy powdered metal valve guides for added longevity. Manley Severe Duty intake valves and Extreme Duty Inconel exhaust valves are designed to withstand the abuse of extreme temperatures and stresses of big power adder applications. Trick Flow by PAC Racing dual valve springs, titanium retainers, .750-inch thick deck, and 6-bolt-per-cylinder mounting pattern round out the features.
This Trick Flow GenX 280 HIP cylinder head work with all LS3 intake manifolds and LS9/LSA blower assemblies and fit all LS head gasket and engine block combinations. Sold individually.
Cylinder Head Specs:
Part Number: TFS-3261T04-HC01
Combustion Chamber Volume (cc): 67
Intake Runner Volume (cc): 280cc
Exhaust Runner Volume (cc): 87cc
Cylinder Head Material: Cast aluminum
Camshaft Style: Hydraulic roller
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 2.165 in.
CNC-Machined Combustion Chamber: Yes
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Combustion Chamber Style: Heart
Intake Port Location: Standard
Exhaust Port Shape: Oval
Exhaust Port Location: Standard
Spark Plug Style: Angle
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in.): 1.600 in.
Valve Springs Included: Yes
Maximum Valve Lift (in.): 0.650 in.
Outside Diameter of Outer Spring (in.): 1.300 in.
Damper Spring Included: No
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Titanium
Locks Included: Yes
Lock Style: 7 degree
Valve Stem Seals Included: Yes
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 12
Exhaust Valve Angle: 12
Valve Guides Included: Yes
Valve Guide Material: Powdered metal
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Cylinder Head Color: Natural
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold individually.
Notes: These cylinder head can only be used with a minimum bore diameter of 4.000 in. Includes new rocker arm rail mounts for use with LS3 1.7 ratio rocker arms. OEM rocker arm rail mounts will not work with these head.
Key features:
280cc intake ports and 67cc combustion chambers
HIP'd casting
Accepts 3/8 in. pushrods
Powdered metal valve guides
2.165 in. NK-844 severe duty stainless steel intake valves
1.600 in. XH-432 extreme duty Inconel exhaust valves
.750 in. thick deck
6-bolt configuration
Includes a Trick Flow LS3 rocker stand
